Investment Securities (Amortized Cost And Estimated Fair Value Of Investments In Debt Securities By Contractual Maturity) (Details) $ in Thousands	Sep. 30, 2021 USD ($)
U.S. Government Sponsored Entities Asset-Backed Securities [Member]
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	$ 844,128
Securities Available-for-Sale, Total Fair value	$ 857,149
Debt Securities, Available-for-Sale, Weighted Average Yield	1.73%
US States and Political Subdivisions Debt Securities [Member]
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost	$ 136,029
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value	$ 146,481
Debt Securities, Available-for-sale, Maturity, after Five Through Ten Years, Weighted Average Yield	3.71%
Debt Securities, Available-for-sale, Allocated and Single Maturity Date, Maturity, after 10 Years, Amortized Cost	$ 141,498
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value	$ 152,613
Debt Securities, Available-for-sale, Maturity, after 10 Years, Weighted Average Yield	3.68%
Debt Securities, Available-for-sale, Amortized Cost	$ 277,527
Securities Available-for-Sale, Total Fair value	$ 299,094
Debt Securities, Available-for-Sale, Weighted Average Yield	3.70%
Corporate Debt Securities
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost	$ 9,250
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value	$ 9,293
Debt Securities, Available-for-sale, Maturity, after Five Through Ten Years, Weighted Average Yield	4.10%
Collateralized Loan Obligations
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	$ 388,193
Securities Available-for-Sale, Total Fair value	$ 387,682
Debt Securities, Available-for-Sale, Weighted Average Yield	1.45%

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in sixth through tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), without single maturity date and not allocated over maturity grouping.

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Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), without single maturity date and not allocated over maturity grouping.

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Weighted average yield of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), maturing after tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

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-Publisher SEC
-Name Industry Guide
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